buy a better oscilloscope than the Siglent SDS1104X-E

[BillyO]

For instance I will take simpler device, that is reliable and works well, over a device that was developed by marketing department and has impressive list of "features" in datasheet but none of it works as it should...

You mean like these: http://hantek.com/products/detail/17182

And these: http://www.fnirsi.com.cn/product/704340100322037760

 
 
 
 
 

[Performa01]

… so in my last posting I've shown the absolute worst case – and was curious if someone would jump at it. That's not happened, so here I'll show a more realistic use case.

In my last posting, I've used 1 meg input impedance and left the input open, which would be equivalent to a x10 probe at low frequencies. In any real power supply noise measurement we would either use a direct coax connection (total input impedance <50 ohms) or a x1 probe (total input impedance is a couple hundred ohms) – especially when looking for very low noise levels like 600 µV.

While the termination doesn't make a significant difference at higher frequencies when it comes to noise, it is still important at low frequencies. This time I use 50 ohms input impedance (the result would be the same if we choose 1 meg input impedance and use an external termination up to a few kiloohms).

Furthermore, there's no need to worry about aliasing, even when we lower the FFT-sample rate a bit. If the noise from the PS has high frequency content, then we need a wide FFT bandwidth hence also a high FFT sample rate anyway. If it's really just low frequency noise, then a low sample rate is sufficient. Aliasing would only fold down the scopes own noise, thus rising the intrinsic noise level of the measurement, but because of the strong 1/f characteristic it absolutely doesn't matter if a higher frequency part with <5 nV/√Hz gets added to the measurement. Consequently, I've now chosen 10 ms/div horizontal time base for a lower frequency limit of 10 Hz and a FFT sample rate of just 25 MSa/s.

SDS2354X Plus_Noise_50_10ms_20kHz_10bit

As we've seen before, 600 µVpp would be equivalent to 212 µVrms or -60,46 dBm and the OP could analyze noise and spurs in his scenario as long as the FFT plot does not exceed that level. As we can see from the attached graph, even at just 100 Hz, the measured level is still -91 dBm (this time for 45 Hz bandwidth), that leaves plenty headroom for analyzing a -60.46 dBm signal.

[Fungus]

Look again, it's much more than "touch screen bolted onto legacy interface".

If you only watch videos and pictures, you might not get the right impression.
In reality, the creation and positioning of the windows was a difficult, annoying and not always as functional as intended matter.

But it was there, it could do it. You could have a 3D view alongside a normal view.

This ultimately drove me into the arms of siglent.
What they offer is not super fancy, but it works as intended.

You'd have a point if they were both the same price, but they aren't.

If price isn't an issue, if you simply want the "best" then why stop at Siglent? R&S make some very nice devices.

Thanks to sub-$500 oscilloscopes, now any semi-serious hobbyist or maker can afford a scope. Since those people are likely a majority of this forum, I'd say $3000 for a scope (while certainly cheap for commercial use) is still WAY out of reach of most of them. I certainly won't pay that for my personal use.

Yep.

For the stated task, ie. measuring noise on a power supply, the Rigol HDO is perfectly capable.

[Fungus]

What mood is that, exactly?

The mood I usually see is a "BMW owners club" mood.

BMW owners justify spending more on their cars by going on and on about how fast they are and how they handle in the corners, how every other brand is somehow "compromised", etc. It all makes sense on paper but the simple fact is that most people just want to get around the place at normal speeds and carry shopping twice a week. A Ford Fiesta can do that perfectly and isn't missing any basic features like aircon or wheels.

Don't believe me? Siglent owners give the exact same excuses for not owning an R&S as BMW 3-series owners give for not owning a 5-series or 7-series.

Maybe when somebody asks "what 'scope should I buy?" we should start out by asking them what car they drive and answer accordingly. I predict these threads will be a lot shorter if we do that.

Thanks to sub-$500 oscilloscopes, now any semi-serious hobbyist or maker can afford a scope. Since those people are likely a majority of this forum, I'd say $3000 for a scope (while certainly cheap for commercial use) is still WAY out of reach of most of them. I certainly won't pay that for my personal use.

Yep.

[Performa01]

If price isn't an issue, if you simply want the "best" then why stop at Siglent? R&S make some very nice devices.

Oh yes ... "the  best". You sure have massive experience with R&S scopes. It would be very interesting how you manage to do the measurements I've shown above with just 128kpts FFT length? As always, I miss the demonstration and measurement results to back up your claims...

Yep.

For the stated task, ie. measuring noise on a power supply, the Rigol HDO is perfectly capable.

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

[2N3055]

What mood is that, exactly?

The mood I usually see is a "BMW owners club" mood.

BMW owners justify spending more on their cars by going on and on about how fast they are and how they handle in the corners, how every other brand is somehow "compromised", etc. It all makes sense on paper but the simple fact is that most people just want to get around the place at normal speeds and carry shopping twice a week. A Ford Fiesta can do that perfectly and isn't missing any basic features like aircon or wheels.

Don't believe me? Siglent owners give the exact same excuses for not owning an R&S as BMW 3-series owners give for not owning a 5-series or 7-series.

Maybe when somebody asks "what 'scope should I buy?" we should start out by asking them what car they drive and answer accordingly. I predict these threads will be a lot shorter if we do that.

Thanks to sub-$500 oscilloscopes, now any semi-serious hobbyist or maker can afford a scope. Since those people are likely a majority of this forum, I'd say $3000 for a scope (while certainly cheap for commercial use) is still WAY out of reach of most of them. I certainly won't pay that for my personal use.

Yep.

Another bad car comparison.....

What are you tryin to say?  I honestly don't get it?

[Fungus]

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

Dave's video was about pretty much nothing other than noise measurement:

[2N3055]

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

Dave's video was about pretty much nothing other than noise measurement:

Errm... it is not?

As I said before, it seems Rigol uses decent ADC this time. And it seems to be (very?) decent noise levels, hardware vise.
But that is hardware "promise". With half baked FFT and unfinished software not there yet.

Problem in the real world is that measuring microvolt levels is not easy, and it is questionable if OP can make setup that will be better than the scope he has now... As Nico says, probing, grounding, shielding  etc is critical here.

It is unclear (even to OP) what he really needs. Saying "600 uV levels on power supply" without stating is it RMS or P-P or what BW is not really clear requirement. Also depending as to what this power rail is for maybe such low noise/ripple levels are not needed at all, i.e. devices powered also have it's own PSRR that might be sufficient for power not to be critical at all...

[mawyatt]

What mood is that, exactly?

The mood I usually see is a "BMW owners club" mood.

BMW owners justify spending more on their cars by going on and on about how fast they are and how they handle in the corners, how every other brand is somehow "compromised", etc. It all makes sense on paper but the simple fact is that most people just want to get around the place at normal speeds and carry shopping twice a week. A Ford Fiesta can do that perfectly and isn't missing any basic features like aircon or wheels.

Don't believe me? Siglent owners give the exact same excuses for not owning an R&S as BMW 3-series owners give for not owning a 5-series or 7-series.

Maybe when somebody asks "what 'scope should I buy?" we should start out by asking them what car they drive and answer accordingly. I predict these threads will be a lot shorter if we do that.

Thanks to sub-$500 oscilloscopes, now any semi-serious hobbyist or maker can afford a scope. Since those people are likely a majority of this forum, I'd say $3000 for a scope (while certainly cheap for commercial use) is still WAY out of reach of most of them. I certainly won't pay that for my personal use.

Yep.

Another bad car comparison.....

What are you tryin to say?  I honestly don't get it?

Maybe not os bad.

We Drive a pair of Siglent's and our MSOs (Max Speed Object) are a pair of Porsche 911s, one is a Twin Turbo (Black) for the faster waveform captures

Rigol has apparently developed a good custom new engine (12 Bit ADC) and new chassis (OS) but hasn't quite got the handling (UI) refined yet, whereas Siglent is using a GP engine, older chassis (OS) and has considerable refined handling.

So on the Track (actual use) the Rigol is fast on the straights (simple tasks), but struggles in the braking & corners (skilled tasks) due to the handling (UI) and suffers slower overall track times (user experience), whereas the Siglent is fast everywhere with the superior handling (UI) and sports an overall quicker lap time (user experience).

Best,

[Fungus]

Dave's video was about pretty much nothing other than noise

Errm... it is not?

Confirmed,  there's no arguing with Siglent/BMW owners.


Clue: Nobody's saying you're wrong.

[uargo]

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

Dave's video was about pretty much nothing other than noise measurement:

Errm... it is not?

As I said before, it seems Rigol uses decent ADC this time. And it seems to be (very?) decent noise levels, hardware vise.
But that is hardware "promise". With half baked FFT and unfinished software not there yet.

Problem in the real world is that measuring microvolt levels is not easy, and it is questionable if OP can make setup that will be better than the scope he has now... As Nico says, probing, grounding, shielding  etc is critical here.

It is unclear (even to OP) what he really needs. Saying "600 uV levels on power supply" without stating is it RMS or P-P or what BW is not really clear requirement. Also depending as to what this power rail is for maybe such low noise/ripple levels are not needed at all, i.e. devices powered also have it's own PSRR that might be sufficient for power not to be critical at all...

600uVpp, I use a 2.5vdc CJ431 (Chinese TL431) voltage reference and the 12-bit adc from an STM32F401RCT6, so 2.5vdc/4096 steps = 0.0006v each step. but there is noise that I would like to reduce. and if I use a digital filter.
The source consists of:
1 - 12vdc input
2 - 12vdc input, dc-dc source with a Tps54331 and 5vdc output
3 - 5vdc input, linear source with Ams1117-3.3 with 3.3v output

STM32F401RCT6 and Cj431 voltage reference at 2.5v powered at 3.3vdc

[2N3055]

Dave's video was about pretty much nothing other than noise

Errm... it is not?

Confirmed,  there's no arguing with Siglent/BMW owners.

Clue: Nobody's saying you're wrong.

You are the king of arguing with irrelevant or nonconnected data.

Dave unpacked that scope for 23 minutes and then for 7 minutes has shown it has less waveform noise and better resolution that scopes with less resolution a larger noise. He could have shown comparison to several low noise 8 bit scopes (that includes several Siglents and a litlle Micsig) or compare it to other 12 bit low noise scopes.
But that is beyond point.

What would be interesting and "on point" for this topic would be showing how well Rigol DHO(HDO) would fare measuring a PSU noise.
Where you need an FFT, and high sensitivity, and low noise etc...

What he has shown is Rigol has nice packing, and unfinished product. That video is not a good recommendation. Rigol has to quickly debug and finish software and make a new video that shows it actually works..

Like Mike says, modern DSO are signal analysis machines. Rigol at this stage of development is an analog scope with some analysis options...
How well those develop with time will shape how I judge it's usability for the task..

[2N3055]

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

Dave's video was about pretty much nothing other than noise measurement:

Errm... it is not?

As I said before, it seems Rigol uses decent ADC this time. And it seems to be (very?) decent noise levels, hardware vise.
But that is hardware "promise". With half baked FFT and unfinished software not there yet.

Problem in the real world is that measuring microvolt levels is not easy, and it is questionable if OP can make setup that will be better than the scope he has now... As Nico says, probing, grounding, shielding  etc is critical here.

It is unclear (even to OP) what he really needs. Saying "600 uV levels on power supply" without stating is it RMS or P-P or what BW is not really clear requirement. Also depending as to what this power rail is for maybe such low noise/ripple levels are not needed at all, i.e. devices powered also have it's own PSRR that might be sufficient for power not to be critical at all...

600uVpp, I use a 2.5vdc CJ431 (Chinese TL431) voltage reference and the 12-bit adc from an STM32F401RCT6, so 2.5vdc/4096 steps = 0.0006v each step. but there is noise that I would like to reduce. and if I use a digital filter.
The source consists of:
1 - 12vdc input
2 - 12vdc input, dc-dc source with a Tps54331 and 5vdc output
3 - 5vdc input, linear source with Ams1117-3.3 with 3.3v output

STM32F401RCT6 and Cj431 voltage reference at 2.5v powered at 3.3vdc

You will need a better reference.....

For interesting solution, lookup low noise designs based on old 723..  but you will need to power it with 12 V directly..
That would also be lower tempco...
 Use it as VDDA and ref...

[uargo]

Here also ... have you ever tested one? If so, why not show us the results, so everyone can see this "perfect capability" with their own eyes? I do not doubt that it can do it, but seeing is believing...

Dave's video was about pretty much nothing other than noise measurement:

Errm... it is not?

As I said before, it seems Rigol uses decent ADC this time. And it seems to be (very?) decent noise levels, hardware vise.
But that is hardware "promise". With half baked FFT and unfinished software not there yet.

Problem in the real world is that measuring microvolt levels is not easy, and it is questionable if OP can make setup that will be better than the scope he has now... As Nico says, probing, grounding, shielding  etc is critical here.

It is unclear (even to OP) what he really needs. Saying "600 uV levels on power supply" without stating is it RMS or P-P or what BW is not really clear requirement. Also depending as to what this power rail is for maybe such low noise/ripple levels are not needed at all, i.e. devices powered also have it's own PSRR that might be sufficient for power not to be critical at all...

600uVpp, I use a 2.5vdc CJ431 (Chinese TL431) voltage reference and the 12-bit adc from an STM32F401RCT6, so 2.5vdc/4096 steps = 0.0006v each step. but there is noise that I would like to reduce. and if I use a digital filter.
The source consists of:
1 - 12vdc input
2 - 12vdc input, dc-dc source with a Tps54331 and 5vdc output
3 - 5vdc input, linear source with Ams1117-3.3 with 3.3v output

STM32F401RCT6 and Cj431 voltage reference at 2.5v powered at 3.3vdc

You will need a better reference.....

For interesting solution, lookup low noise designs based on old 723..  but you will need to power it with 12 V directly..
That would also be lower tempco...
 Use it as VDDA and ref...

thanks

[Martin72]

What mood is that, exactly?

In any case, already no car club nonsense....

No, I sometimes have the feeling that some overestimate the measuring equipment for small money or expect too much from it, because you have to spend quite a lot on it in relation to other hobby expenses.

[tautech]

What mood is that, exactly?

In any case, already no car club nonsense....

No, I sometimes have the feeling that some overestimate the some measuring equipment for small money or expect too much from it, because you have to spend quite a lot on it in relation to other hobby expenses.

Fixed. 

[Veteran68]

What mood is that, exactly?

In any case, already no car club nonsense....

No, I sometimes have the feeling that some overestimate the measuring equipment for small money or expect too much from it, because you have to spend quite a lot on it in relation to other hobby expenses.

Fair enough. I can agree with that sentiment.

And I want to be clear, I'm a fan of nice toys. I'm not judging ANYONE for what they choose to spend their own money on as long as they're not hurting anyone else with it. I like BMW's, though I don't own one. I do however drive a 2021 Audi that was not inexpensive, so some would put me in the same boat. Point being, it's not like I'm a cheapskate who thinks hobbyists buying $3K scopes is stupid, it just doesn't make sense to me in my situation. Not that I can't afford it, just that I don't see it as a wise investment -- unlike a nice car, which others may rightly argue with. My cap would probably be in the ~$1500 range for a single piece of gear. Some will see that as cheap, and others will see it as exorbitant.

If someone gets as much enjoyment out of their high end scope that I get out of my car, more power to them, no judgment from me. But I can certainly understand it being way out of range of most hobbyists and why they might question the sanity of such an investment. Likewise, to your point, they should also understand that they're not going to get $3K capability/quality/support out of a $300 (or $50) scope , and they need to be okay with that too.

I have a considerable investment in my home lab, no question about it. I have a particular weakness for collecting multimeters and have spent a small fortune on my collection, and am not done. I'm eyeing another 6.5 digit bench meter, even though I have no real justification for it, other than I want an update to my 34401A. I just think about how many toys I can buy and play with for the cost of one $3K scope that I'll likely never reach the capability of.

[KungFuJosh]

$3K isn't much for a scope. But just for fun, look at the SDS2104X Plus. If you unlock all the options, and upgrade to 500MHz, the total cost is $6821. Or $6252 total if you buy the SDS2354XP and upgrade that with all options to 500MHz. That's $6k to $7k for what's not really considered a mid-level scope. It's a wonderful scope all the same.

[Veteran68]

$3K isn't much for a scope. But just for fun, look at the SDS2104X Plus. If you unlock all the options, and upgrade to 500MHz, the total cost is $6821. Or $6252 total if you buy the SDS2354XP and upgrade that with all options to 500MHz. That's $6k to $7k for what's not really considered a mid-level scope. It's a wonderful scope all the same.

Oh, I'm well aware. I've worked with scopes well into the 5 figures, but that was in a business/professional lab. I'm talking strictly hobby here. Maybe if electronics was my ONLY hobby, I'd be willing to drop $3K on a scope. But I have several hobbies, and all happen to be expensive...

[tautech]

$3K isn't much for a scope. But just for fun, look at the SDS2104X Plus. If you unlock all the options, and upgrade to 500MHz, the total cost is $6821. Or $6252 total if you buy the SDS2354XP and upgrade that with all options to 500MHz. That's $6k to $7k for what's not really considered a mid-level scope. It's a wonderful scope all the same.

Unlock = buy = make permanent whereas as standard you have all optional capability for 30 free trial uses.
BW upgrades have never had trial uses.

Yep SDS2kXP is a very capable DSO.

Yesterday a buddy/customer had issues with the timebase....self inflicted as he had never engaged the Reference position feature so increasing the timebase would shoot the H Pos setting off the display and exceed the max horizontal offset and flag a warning.
After he updated the FW after I discovered he never had  the same issue was present until the H Pos button was pressed to set it back to zero. Then no further problem...as expected, so guided him through setting the H Pos Ref position after which he was as happy as a dog with 2 tails. 

[uargo]

Taking into account that the Siglent SDS1104X-E has a background noise of approx =< 250uVrms

I HAVE MADE A TABLE WITH THE MAIN CHARACTERISTICS OF THE CONTENTS

         SIGLENT 2104X PLUS      SIGLENT 2104X HD      RIGOL DHO1104         SIGLENT SDS1104X HD               
         
BITS:         8 - 10 MODE(100MHZ)      12            12            12
CANALES:      4            4            4            4
FRECUENCIA:      100-350MHZ         100-500MHZ         70-200MHZ         70-200MHZ
SAMPLEO:      2GSA/S TOTAL         2GSA/S TOTAL         2GSA/S            1GSA/S
MEMORIA:      400MB  TOTAL         400MB TOTAL         100MB TOTAL         100MB TOTAL
SAMPLES:      120.000 - 500.000WFM/S      100.000-500.000WFM/S      50.000-1.500.000WFM/S      80.000-400.000WFM/S
GRADOS DE COLOR:   256            256            256            256
SERIAL PROTOCOL:   YES OPT.         YES OPT.         YES- OPT.         YES- OPT.
MIN VOLT:      80uVRMSNOISE 500uV/DIV           70uVRMSNOISE 500uV/DIV      66uVRMSNOISE 500uV/DIV      70uVRMSNOISE 500uV/DIV
MATEMATICAS:      2            2            4            4
FFT:         2MB            2MB            1MB            2MB
BODEPLOT:      YES OPT.         YES OPT.         NO            YES OPT.
POWER ANALYSIS:      YES OPT.         YES OPT.         NO            YES OPT.
DIGITAL:      16CHANNEL OPT.         16CHANNEL OPT.         NO            16CHANNEL OPT.
WAVEFORM GEN:      YES OPT.         YES OPT.         NO            YES OPT.
CONS:         LAN, USB(MASTER-DEVICE),   LAN, USB(MASTER-DEVICE),   LAN, USB(MASTER-DEVICE),HDMI   LAN, USB(MASTER-DEVICE),
         TRIGGER OUT, PASS/FAIL, WEB   TRIGGER OUT, PASS/FAIL, WEB   TRIGGER OUT, PASS/FAIL, WEB   TRIGGER OUT, PASS/FAIL, WEB
TFT:         10.1" TOUCH 1024X600      10.1" TOUCH 1024X600      10.1" TOUCH 1280X800      10.1" TOUCH 1024X600
HACKABLE:      YES            ?            YES            ?
PRECIO:         1.450€ AMAZON         3.546€ BATRONIX         1.523€ AMAZON (1.087€-70MHZ)   ?

[tautech]

FYI
All the Siglent scopes listed offer Bode plot capability as std.
Can confirm SDS1000X HD options can be unofficially enabled and for this model series just protocols I2C, SPI, UART, CAN, LIN decodes will be available.

[Performa01]

Taking into account that the Siglent SDS1104X-E has a background noise of approx 300uVrms

Where do you get that number from?

My Siglent SDS1104X-E has 56 µVrms noise for full bandwidth and 27.3 µVrms when 20 MHz bandwidth limiter is active (measured at 500 µV/div). Regarding noise, it is in a similar ballpark as the SDS2000X Plus, yet suffers more and stronger spurious signals.

I HAVE MADE A TABLE WITH THE MAIN CHARACTERISTICS OF THE CONTENTS

To the best of my knowledge, the basic serial triggers and protocols (UART, I2C, SPI, CAN LIN) are free on all Siglent models. Only the more specialized protocols are paid options.

Bode Plotter is a free option as well - you don't even need the AWG license to use the internal AWG for that.

In general, it's questionable what value such a table is. You look for a tool for a certain tasks - and the only thing that really counts is getting one that helps you accomplishing that task best and most effectively.
For example, you dont need a super high waveform update rate at all, but a powerful FFT can help a lot. You didn't even include the FFT in your table. Max. length? Speed? Tools? Yeah, most datasheets won't tell you that in detail anyway.

So if it just were to decide between the two Siglents, you can always look up the numerous demonstrations for both scopes in this forum to get an idea how powerful they are - also with their class-leading 2 Mpts FFT.

You can also listen to the ones who have evaluated the top HR model from Rigol (DHO4000) and tell you that its FFT is very basic and not impressive. And nobody has ever checked the accuracy of the measurements.
Or you listen to those who have never touched anything above a DS1054Z but still tell you how good the DHO800/900/1000 are. Maybe that's even true. But since you get only claims instead of hard facts and demonstrations, it remains a gamble.

[uargo]

Taking into account that the Siglent SDS1104X-E has a background noise of approx 300uVrms

Where do you get that number from?

My Siglent SDS1104X-E has 56 µVrms noise for full bandwidth and 27.3 µVrms when 20 MHz bandwidth limiter is active (measured at 500 µV/div). Regarding noise, it is in a similar ballpark as the SDS2000X Plus, yet suffers more and stronger spurious signals.

I HAVE MADE A TABLE WITH THE MAIN CHARACTERISTICS OF THE CONTENTS

To the best of my knowledge, the basic serial triggers and protocols (UART, I2C, SPI, CAN LIN) are free on all Siglent models. Only the more specialized protocols are paid options.

Bode Plotter is a free option as well - you don't even need the AWG license to use the internal AWG for that.

In general, it's questionable what value such a table is. You look for a tool for a certain tasks - and the only thing that really counts is getting one that helps you accomplishing that task best and most effectively.
For example, you dont need a super high waveform update rate at all, but a powerful FFT can help a lot. You didn't even include the FFT in your table. Max. length? Speed? Tools? Yeah, most datasheets won't tell you that in detail anyway.

So if it just were to decide between the two Siglents, you can always look up the numerous demonstrations for both scopes in this forum to get an idea how powerful they are - also with their class-leading 2 Mpts FFT.

You can also listen to the ones who have evaluated the top HR model from Rigol (DHO4000) and tell you that its FFT is very basic and not impressive. And nobody has ever checked the accuracy of the measurements.
Or you listen to those who have never touched anything above a DS1054Z but still tell you how good the DHO800/900/1000 are. Maybe that's even true. But since you get only claims instead of hard facts and demonstrations, it remains a gamble.

I have put the FFT in the table, look well, I have been researching on the internet to obtain the background noise of the SDS1104X-E and the only thing I have found is that it is:

Table 8 Noise Floor Limited Range for 2-Channel
Volt/Div        Stdev Limited Range
500 uv         ≤ 250 uv

link:https://int.siglent.com/upload_file/user/SDS1000X-E/SDS1000X-E_ServiceManual_SM0101E-E01A.pdf

and where do you get that it has 56uVrms ( better even than the $4,600 12-bit 350Mhz SDS2354X HD which has 70uVrms)

It is clear that my oscilloscope and yours, even though they are the same model, have different characteristics.

[Martin72]

better even than the $4,600 12-bit 350Mhz SDS2354X HD which has 70uVrms

65µVrms, look at the datasheet.
And: Noise rises more or less with the bandwith.
Plus: The difference between 56µVrms and 65µVrms is....nothing.
Plus, the second: You already have a SDS1104X-E, so you can measure it in real and now.
At the moment I let the SDS1104X-E warm up for it...